One of Szabo's central objections is his ‘reservations about the alleged slide from moderate to radical contextualism’. First, some background: the argument Szabo expresses doubt about is essential both to the critical part of our book and to its positive part. Our argument against what we call moderate contextualism depends on the assumption that it collapses into radical contextualism. Our positive view depends on the assumption that for any utterance, we can trigger the intuition that many different propositions are said (this is at the core of our speech act pluralism). So Szabo is attacking one of the key assumptions in IS – if his 'reservations' are well justified, most of what we have to say collapses